PicMonkey: Online Photo Editor
PicMonkey is an easy to use online photo editing site that allows you to resize, recolor, adjust lighting, add stamps, add borders, add text, fix red-eye, etc.

Unlike many interactive sites, PicMonkey does not require students to register or login to use the service. They can simply drag an image file into the window to upload it and start editing. Once you’re image is uploaded, a menu on the left gives you access to basic editing tools, touch-ups, text overlays and advanced features, such as blemish fixes, teeth whitening, frames and stamps. For now, all of the features are free to use. Some effects and tools (marked with a crown) will eventually be part of the site’s paid service.
If you used the now closed Picnik photo editor we previously recommended, PicMonkey is an excellent replacement.